Tried installing EOS tweaks, failed and now apt update doesn't work

Question

So I wanted to install tweaks and have been at it for the past hour and a half, it keeps giving me this error. I did install software-properties-common and it still didn't change anything.

sudo add-apt-repository ppa:philip.scott/elementary-tweaks

Err:13 http://ppa.launchpad.net/mpstark/elementary-tweaks-daily/ubuntu bionic Release         
  404  Not Found [IP: 91.189.95.83 80]
Reading package lists... Done                                                                 
E: The repository 'http://ppa.launchpad.net/mpstark/elementary-tweaks-daily/ubuntu bionic Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.

Now I'm getting an error when I update as well.

sudo apt update


Err:18 http://ppa.launchpad.net/mpstark/elementary-tweaks-daily/ubuntu bionic Release    
  404  Not Found [IP: 91.189.95.83 80]

Reading package lists... Done                                                                 
E: The repository 'http://ppa.launchpad.net/mpstark/elementary-tweaks-daily/ubuntu bionic Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.

Any help on how to properly finish this installation would be amazing, thanks!

Answer 1

Try this:

1) first remove previously added repository:

sudo add-apt-repository --remove ppa:philip.scott/elementary-tweaks/ppa

2) Then add it manually:

• right-click Files icon, select New Window as Admin and go to /etc/apt/sources.list.d/;
• in that directory, create an empty file and name it philip_scott-ubuntu-elementary-tweaks-bionic.list;

• open that file (i.e. in Code or any other text editor) and paste the following two lines into it:

  deb http://ppa.launchpad.net/philip.scott/elementary-tweaks/ubuntu bionic main

  # deb-src http://ppa.launchpad.net/philip.scott/elementary-tweaks/ubuntu bionic main

• save and close the file and try to sudo apt update.